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Document 50581 Rev A 12/9/96 P/N 50581:A
Section Two: Operation
LED Indicators and Piezo Sounder
The LED-10N is an LED annunciator which indicates the system and zone status of its
associated SFP-1024 fire alarm control panel.
AC
Power
This is a green LED which illuminates if AC power is
applied to the host FACP. The green LED will turn
off if AC power to the host FACP is lost.
Alarm
This is a red LED that flashes (1 second on, 1
second off) when one or more fire alarms occur.
The piezo sounder turns on steady for alarm. The
LED illuminates steadily when the Acknowledge or
Silence key is pressed and the piezo silences. The
Alarm LED turns off when the Reset key is pressed.
Trouble
This is a yellow LED that flashes (1 second on, 1
second off) when one or more trouble conditions
occur. The piezo sounder pulses (1 second on, 1
second off). The LED turns on steady when the
Acknowledge or Silence key is pressed and the
piezo silences. The LED turns off when all trouble conditions are cleared. This
LED will also illuminate if the microprocessor watchdog circuit within the LED-10N
is activated.
Supervisory
This is a yellow LED that flashes (1/2 second on, 1/2
second off) when one or more supervisory conditions
occur, such as a sprinkler valve tamper condition.
The piezo sounder pulses (1/2 second on, 1/2
second off). The LED illuminates steadily when the
Acknowledge or Silence key is pressed and the piezo silences. The Supervisory
LED turns off when the Reset key is pressed.
Zone Alarm - Zones 1 through 10
This is a red LED that flashes when a fire alarm,
supervisory alarm or process monitoring alarm
occurs on the corresponding zone. The LED flashes
at a 1 second on/1 second off rate for an alarm
condition, a 1/2 second on/1/2 second off rate for a supervisory alarm and a 1/4
second on/1/4 second off rate for a process monitoring alarm. The piezo sounder
will pulse at a rate corresponding to the flashing LED. The LED illuminates steadily
when the Acknowledge or Silence key is pressed and the piezo silences. The LED
turns off when the alarm, process monitoring alarm or supervisory alarm is cleared
on the corresponding zone and the Reset key is pressed.
Note: Be certain to use customized slide-in label to identify the zone function. This
red LED will flash for supervisory conditions if the FACP is not programmed for
Canadian operation. Refer to the SFP-1024 Manual P/N 50475 for details.
Operation
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